ABSTRACT The effect of various process parameters like welding current, torch height, welding speed
and plasma gas flow rate on front melting width, back melting width and weld reinforcement
of plasma arc welding on aluminum alloy is investigated by using factorial design approach.
Variable polarity plasma arc welding is used for welding aluminum alloy. Trail experiments
are conducted and the limits of the input process parameters are decided. Two levels and four
input process parameters are chosen and experiments are conducted as per typical design
matrix considering full factorial design. Total sixteen experiments are conducted and output
responses are measured. The coefficients are calculated by using regression analysis and the
mathematical models are constructed. By using the mathematical models the main and
interaction effect of various process parameters on weld quality is studied.
Cite this paper
K. Prasad, C. Rao and D. Rao, "Prediction of Weld Bead Geometry in Plasma Arc Welding using Factorial Design Approach," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 10, 2011, pp. 875-886. doi: 10.4236/jmmce.2011.1010068.
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